How to convert between gallons and liters?
Converting between gallons and liters is especially useful for liquid measurements in various contexts, from household use to industrial applications.
Conversion formulas:
1 gallon = 3.78541 liters
From gallons to liters:
liters = gallons × 3.78541
From liters to gallons:
gallons = liters ÷ 3.78541
Practical examples
Small gas tank:
10 gallons = 37.85 liters
Calculation: 10 × 3.78541 = 37.85 liters
Water container:
20 liters = 5.28 gallons
Calculation: 20 ÷ 3.78541 = 5.28 gallons
Common equivalents
| Gallons | Liters | Common Use |
|---|---|---|
| 1 gal | 3.79 L | Large milk jug |
| 5 gal | 18.93 L | Water cooler bottle |
| 10 gal | 37.85 L | Small aquarium |
| 15 gal | 56.78 L | Typical gas tank |
| 20 gal | 75.71 L | Home water tank |
Common subdivisions
1 gallon = 4 quarts
1 gallon = 8 pints
1 liter = 1000 milliliters
The metric system (liters) uses decimal divisions, while the imperial system (gallons) uses traditional fractions.
Common uses
- Automotive:
Measuring fuel and other vehicle fluids.
- Household:
Measuring water, cleaning products, and other domestic liquids.
- Gardening:
Watering and measuring liquid fertilizers.
- Industry:
Industrial processes and liquid storage.
Conversion tips
- Quick approximation: For quick estimates, consider 1 gallon as approximately 4 liters.
- Precise measurements: In contexts requiring precision, always use the exact conversion of 3.78541 liters per gallon.
- International purchases: Pay attention to whether products are measured in US gallons or British Imperial gallons (the latter are approximately 20% larger).
Did you know?
The US gallon was originally defined as the volume of 231 cubic inches, while the liter was defined as the volume of one cubic decimeter (1000 cubic centimeters). This difference in definition explains why the conversion isn't a round number.